Hoist or elevator



(No Model.)

' T. MGDONOUGH.

, HoIsT 0R BLBVATOR.

No. 218,445. Patented May 29,1883.

Waff/055.553 fm1/anim".

tion represents the ear O `and UNITED STATES PATENT Carien.

THOMAS MGDONOUGH, MONTCLAIR, NEW JERSEY.

` -HOIST ORHELEVATOR.

SPECIFIGATION forming part of Letters Patent N o. 278,445, dated May 29,11883.

` I Application tiled February 13,1883. (No modell) To all whom `it may concern Be it known that I, THOMAS McDoNoUGH, a citizen `of the United States, residing at Montclair, in the county of Essex and State of New Jersey, have invented Improvements in Hoists or Elevators, of which the following is a full, clear, and exact description.

The purpose of my invention is to prevent `the car from `falling should the hoisting-rope break, byhavinga cross-beam directly beneath the car and attached to it atthe center ofthe beam, the. ends of which rest all the time on solid supports builtin the sides ofthe shaft or well in whiehthe car is raised and-lowered.

The drawing accompanying this specifica two side guides, looking upward at its The front and back guides, or long as seen frin below, bottom.

timbers between which the ear moves, are not represented` in the drawing.

A cross-beam, hangs below the car from a bolt fastened to the car-bottom at its middle, on` which the few inches.

beam revolves, and also slides. up and down a When it slides up on the bolt it jams against the timbers of the car and cannot revolve; but when it is kepta few inches below the ear it can revolve freely. A spring', snicient to counteract the weight o f the beam, tends at all times to keep the beam up against the car-bottom, and the lever L, which has one end pressing upon the-beam and its outer end` connected by a cord with the hoistin g-rope above the car, (so long as there is tension on the rope,) will overpower `the spring and keep the beam away from the car. When the rope breaks or falls the strain on the outer lthe car to slide past.

ters Patent of the United way throughout its height, and marked S S.

The corner guidetilnbers,where.ver the spirals pass them, are reeessed,'or else the spirals are cut away at the poststo allow the guides `on The drawing shows the former plan, and uninterrupted spirals are set in recesses in the posts.` sulting from this' arrangement ofa beam hang` ing beneath the car is as follows: -When the 'lng-rope the beam revolves on the spiral guides or supports, as it freely follows the movement ofthe car up and down; but when the rope breaksthe car and beam are instantly interlocked, and both are prevented .from moving, the earbeing held up by the`heam,`the ends of' which rest on firm supports.

What I claim, and desire to secure by Leti States, is-

The combination of the beam B `with the spirals S S and the lever L7 substantially as described.

' THOMAS MODONOUGH. Witnesses:

J. H. Posr,

N1 O. PILLsBURY.

The movement re- SS weight ofthe car is properly held bythe hoistl 

